All the Cave-men believed that these words would charm the reindeer to the spot. They always muttered such lines as charms when they went out to hunt. And so Greybeard taught the boys the lines, for he wanted them to know all the Cave-men's charms. #THINGS TO DO# _Name the animals which you know by their tracks. Draw a picture of the tracks you know best._ _Tell a story about hunting an animal by tracking it._ _Next time there is a heavy fall of snow, play hunting animals by driving them into the drifts._ _See if you can show in your sand-box how the pitfall was made._ _See if you can think of a way of having real drifts in your sand-box._ _Draw a picture of the children playing with the antlers of the reindeer._ _Draw a picture of the reindeer in the pitfall._ XVIII THINGS TO THINK ABOUT Do you know whether we can tell what the weather is going to be? Have you ever heard any one talking about the signs of the weather? What signs do you know? Notice animals and see how they act before a storm. Notice what animals and birds are here in summer that are not here in winter. Are any here in winter that are not here in the summer? Why did the bison go away from the Cave-men's hunting grounds each winter? When they went away would they go in large or small herds? If the weather kept pleasant how do you think they would travel? What would they do if it looked like a storm? Notice the animals that live near you and see whether they turn their heads or backs toward the storm. _Overtaken by a Storm_ Winter passed and summer came and now it was almost gone. The cattle had gone to the forests in the lowlands where they spent the winter. Straggling lines of bison were moving down the valley. Now and then they stopped a few days to eat the tall grass. Then they slowly moved onward toward the lower lands. The days were like the Indian summer days which we sometimes have in late autumn. Everybody enjoyed each day as it came, and thought little about the coming cold. But one morning the sky was gray and gloomy, and the sun could not pierce through the heavy clouds. The air was cold and now and then a snowflake was falling. There was no meat at the cave, and everybody was hungry. So Bighorn said to the men, "Let's hunt the bison to-day." The men crowded around, for they were always glad to go hunting with Bighorn. As soon as he had shown them his plan, they took their weapons and started toward the herd. Bighorn expected to find the herd feeding quietly on a hillside. But, instead, the bison were tossing their horns, sniffing the air, and looking this way and that. Bighorn saw that the bison were restless and that he could not take them by surprise. "We shall have a hard chase," said he to the men, "if we get a bison to-day."